Quote:
Originally Posted by jhowell
My Oasis screen is 1264x1680 pixels and the maps in this book are meant to be shown as a full page. I can't think of a good reason for Amazon to have butchered them in this way.
I hadn't noticed this extreme level of image processing before either. Perhaps it is something fairly new or just uncommon.
My working hypothesis is that it was triggered by publishing those maps using large, detailed GIF images. If I am right about that the decision of whether to use GIF or PNG or JPEG may end up being important.
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Maybe not.
A couple of my ebooks that I previously bought from amazon with maps of disappointing resolution are low priced as EPUB at the moment, so I bought them to check their illustrations. They are the Simon & Schuster Maude translation of
War and Peace and
Marcus Agrippa by Lindsay Powell. The former is 99 cents, its regular price, but sometimes it is a freebie. The latter is $2.99 at amazon and kobo but is $19.99 at ebooks.com
Any way, all the images in both EPUBs are JPEG. Except for some probably dual page images, none are more than slightly larger than an Oasis 2 or 3 screen (a bit longer in the long dimension and a bit shorter in the short dimension). Images from the azw3 that are on the order of 1100x1800 or larger in the EPUBS are shrunk to 55% to 75% in dimension and JPEG compression cranked up enough to cause significant artifacts in and near text, sometimes degrading readability as much or more than dimensional resolution loss. Color photographs on the order of 600x1100 or smaller retain their resolution but are very heavily compressed compared to the color photographs from the EPUBS.
I'm not set up to look into whether KFX versions downloaded directly to an Oasis over cellular/wifi escape dimension shinking without spending a lot of time and effort. But it looks to me like GIF is not the trigger for dimension shrinking.